Well hate to burst everyone bubble but only are 4numbers for springs for hbody cars4cylv-6 / v-82+2and v-6 v-8 2+2 A/C one number has been delettedavailiabilityanything but 2+2 has 4cyl springs accept v-6's(discontinued) So use either eibach springs(custom) ormorroso drag springs or look for my post on lowering,,,or email me as im working on a airspring conversionfor my 77 monza(Lees Monza in photos)lee

Well as a front end mechanic i have tried allmonza numbers and found only 3 numbers still good andwhen I called my rep at Detroit Eaton Spring and shesaid that only 3 numbers are needed because onlydifference was on couple of monza numbers was wire diameterand half a coil and had design problems and weresubsiquently dropped from standard production for quantityreasons.sorry for mis under standing.Lee